System of distribution of intelligence



1,628,126 May 1 1927- .fJlETERlCH SYSTEM OF DISTRIBUTION OF INTELLIGENCE Filed June a, 1922 2 Sheets-Sheet 1 W' 19 2a a H I4 1% 14 10 y L. M. DIETERICH SYSTEM 0? ms'rnmumou OF INTELLIGENCE Filed June 3 92 '2 Sheets-Sheet 2 llllllllflll of a predete Patented May 1-0, 1927..

AUNITED STATES Lunwm 1r. nrnrnmcn, or new naonswrcx, new mnsnr, sssrenon or n PATENT caries.

PER GENT 1'0 ROBERT S. BLAIR, STAMFORD, CONNECTICUT, AND TWENTY-FOUR I PER 1'0 WILLIAM T. KNIESZNER, OF NEW YORK, N. Y.

' svs'rnm or msrnmurron OF'IHTELLIGENGE.

Application filed June a, eaa; Serial at. 585,641.

tions broadcasted as by means of radio telephonv or telegraphy or,- for example, also by existing telephone lines or connections Another object'of this invention is to. provide simple and practical apparatus by means of which connection to a commonreceiving apparatus of the above nature may v V I viewed from'theleft of Fig. '2; and

be made at will without necessitating the use of a separate and individual complete receiving apparatus which may includesuch devices as tuning circuits, detectors, amplifiers and the like, thus to avoid for each individual station the installation and mainte- 95 nance of such generally expensige receiving equipment. Anotherobject is to provide a system of the above character by means of which connection to a common receiving eta tion may bemade manually and at any desired time by the individual desiring substantiallyindividual receiving service; and to provide also a system of receptionfor communications broadcasted by means of radio telegraphy or radio telephony or b as existing telephone lines by meansof which the receiving service may be carried on for a predetermined length of time and for which a service charge for such period of service maybe made. More specifically, it might be stated that another-object is to provide a receiving system' for such commumcations automatically controlled in'i'ts operation and as to its time of operation in use to the de siting in the ap aratus jects will be inpart obvious or in part out hereinafter. The invention accordingly conslsts m the features or constructionfcombinations of;

# 1 elements and .arrahgements of parts as will beexemplifiedin the tobe herein. i

- by the individual after set forth and the scope'of the iapplica fee or coin. Qt er obtion ofwhi'ch will be indicated .in' the fol- I lowing claims. U

In the accompanying drawing in which is shown one ofV-various possible embodiments of this invention,

Figure 1 isa front elevation of the assem bled controlling apparatus, certainparts be .ing broken away .to'show the construction more clearly, .and there are shown alsodiagrammatically the electrical connections and circuits of the various electrical devices and apparatuses associated with the system;

Figure 1 is a diagrammatic re resentation of a modified form ofpart of t e appa- V ratus of Fig. 1; a 4 f Figure 2 is a sectional view taken on the line 2--2 of 'Fig. 1; i

Figure 3 is a iragmentaryel'evation as;

Figure 4 is a diagrammatic representation showing the, several stages of operation of certain parts of the apparatus.

Figure 4 is a detailed fragmentary front of this-invention it might at this point he stated that daily predetermined programs oi. j. communications of various natures maybe broadcasted, for example either by new):

telegraphy or radio telephony or also,*by I f way of example,-.bymeans of existing telephone lines.- This invention aims in general to provide applaratus for permitting the reception of sue communications to be made to take place'at will in accordance withthe 00 program and to permit such reception to be carried .on for a predetermined length of time and for which" a predetermined charge may be made. More particularly this invention aims to provide individual receiving service from. a common receiving apparatus and preferably under 'the above-mentioned circumstances. Thus, for example, this ins ventionaims to provide a commoner central station for receiving broadeasted communi-v cationszeither b radio 'or by wire, towhich any-diaplura 'ty ofindividual-tele hones or sub-stations may be connected as esired esiring such service. For I exam 1e, a common central receiving station may provided in such places as hotels, apartment houses, Pullman cars and "the li e, and in accordance with this invention individual service from the main or central receiving station may-be obtained for a predetermined length of time for a predetermined fee or charge.

Turning now to the drawings, and more particularly to Fig. 1 thereof, there is'shown at 10 an antenna forming part of the primary circuit including the inductance l1 and a variablecapacity 12 connected serially to the ground as at 13. A secondary circuit comprising the inductance 14 and the variable condenser 15 is coupled to the primary circuit as by means of the inductances 11 and 14, which are referably variable both as to the'individual value of inductance in each and also as to the degree of coupling.

Bridged across the condenser-15, as by means. of the conductors 16 and 17, is a detector and amplifier, set generally indicated at 18. This set preferably com rises any suitable form of detector, prefera ly a three-element vacuum tube, and the amplifier likewise comprises preferably a plurality of \threeelement vacuum tubeswith associated apparatus and circuits. The detector and amplifier set generally indicated at 18, may have the above-mentioned parts thereof arranged in the following manner :-The detector includes the three-element vacuum tube V, the grid G of which is connected, through a suitable grid-leak GL,fof the usual resistance condenser type, to one side of the circuit 14-15, as to the conductor 16, the filament F of which isconnected tothe other side of this circuit 14'15 as to the conductor 17. In Figure 1, are shown, by wa of example, two amplifying tubes V" an V, the filaments F and F", as, well as the filament Fa. of the detector tube V being bridged across the two conductors and 81, which lead to the two binding posts 19 and 20 respectively. The'binding-posts19 and 20 are connected to a suitable source of energy, such as the battery 21, in a manner to be hereinafter more clearly described in order that the filaments may be suitably heated. The successive vacuum'tubes maybe coupled' together in any suitable manner, preferably as by suitable transformers.- Thus, the platecircuit of the tube V is completed from the plate P, through a primary'windl'ng of a transformer T, through a suitable source of potential, such as-the battery .82, by way of the conductor 83, to' the filament F, by way of the conductor 81. w The input circuit of the tube V? is completed from the grid G througha secondary winding of the transformer T", thence to the filament F. The output circuit of the vacuum tube V? is completed from the plate P",

pleted from the grid G, through the secondary winding of the transformer T", thence to the filament F by way of-the conductor",

81. The output circuit of the tube V includes a conductor leading from the plate P to a binding post 22, and mayinclude whatever devices may be connected across the binding posts 22 and 23, the output circuit being completed through the battery 82, thence to the filament I by way of conductor 81. To the binding posts 22 and 23 may be made the connection of the various indi 1 vidual receiving telephonic stations, to include the latter in the output circuit of the amplifier in a manner to be more clearly hereinafter described. For brevity, as well as convenlence, the foregoing devices, with associated apparatus and circuits, will be referred to generally by the reference char} acter 18. p

The main controlling apparatus is preferably housed in a suitable casing 245 within which the various parts'are suitably mounted. Referring to Figs. 1 and 2 of the draw ings, it will be seen that upon' the upper portions of the rear wall 24; of the casing 24 there are mounted two longitudinally extending bus-bars 25 and 26, the former carrying a plurality of spring contacts 25, 25", 25, etc,, and the latter carrying a plurality of contacts 26, 26", 26, etc., respectively, aligned with the contacts on the bus-bar 25. Interposed between the bus-bars 25 and 26 is an insulating strip 27 carrying a plurality of pairs of individual spring contacts aligned with the contacts on the bus-bars 25 and 26.

Thus, the spring contacts 27, 27", 27", etc.,

are respectively aligned 'with the contacts 25', 25", 25, etc., and the contacts 28, 28",

28, etc., mounted upon the insulating strip 27 are respectively aligned with'thecontacts 26, 26", 26, etc., on the bus-bar 26. The bus-bar 25 with its associated contacts 25, 25", 25, etc., is connected through the conductor 19" to the binding post 19 of the amplifier 18 and to the conductor 29to one terminal of an electric motor 30 suitably mounted as bytithe bracket 31 on he side wall of the casing 24. The other binding post 20 of the amplifier 18 is connected by the conductor '20 to one pole of the battery- 21, and'the other terminal of the motor 30 is connected through the conductor 32 to this same pole of the battery 21,the battery f 21 being indicative of a suitable source of current for operating; the, filaments. of the I Q I v igiven sub stat ion, as the station 35, will arrangement thus provided is such that upon any pair of aligned contacts, as 25 and 2T for example, being bridged'electrically or interconnected, the circuit of the filaments of the detector and amplifier tubes will be closed, as well as also the circuit to the motor 30, thus placing the receiving apparatus in operative condition, the various other adjustments necessary, such as the tuning to the desired wave,l ength, having been i 9 previously made.

The bus bar 26 with which the various contacts 26, 26, etc., are in electrical connection, 7 is connected through the conductor 23" to the terminal 23 on the output side of the ampli- 25 fier 18. 7 Each contact- 28, 28 28, etc, I, mounted upon the insulating strip 27 leads to a distinct and separate telephonic receiver or to what might be termeda'n individual telephonic receiving or sub-station. Thus, 9 for example, the contact 28* is connected by the conductor 34 to one side of the head set 35 the other side ofv the pair of telephones being connected by the conductor 34 to the conductor 36 leading to the binding post 22 on the output side of the'amplifier 18. In like manner the contact 28 is connected through a conductor 37 to the pair of head phones 38 forming another sub-station, the other side of the head set 38 beingconnected by the wire 37 a to the conductor 36 leading tothe binding post 22. At this pointit might be noted that the remaining contacts 28, etc., are similarly connected to individy a v Thus the lever 42 has a downwardly ex? ual receiving .phones. which may be vari:

ously' positioned and disposed as desired and which, as shown in Fig, 1, may conveniently be connected through a common conductor 36 to the output side of the amplifier 18.

- In this connection itmight be noted thatthe conductor 36 may conveniently take the form of one of the conductors of an existing callbell' system telephone or lighting system for example, in order thus to avoid complexity and expense in-the wiring installation, it being thus obvious that only one conductor wneed be specially strung to each substation.

It might further be noted that only two such; sub-stations 35 and 38am shown and'th'at any number commensurate-with the number of pairs. onsets of contacts hereinbefore dcscribed may be provided; 'l It will therefore be seen that as agiven pair of contacts, as for example 26 and 28%, are bridged electrically,z the. circuit of b:

" underneath certain parts closed-across "the outputterminals 22 and 23 of the amplifier and the sub-station thus placed in connection with the receiving apparatus; As will be more clearly set forth hereinafter, the two pairs of contacts, as 25 and 27, and 26-and 28*, are preferably simultaneouslybridged in order thatgthc former may place the main receiving apparatus in operativeconditionfas by bringing the filaments of the vacuum tubes to incandescence, and also to start-the operation of the motor 30 for a purpose hereinafter made clear, and in order that the latter may connect the associated sub-station, as 35, to the receiving apparatus thus made operative. a F

Considering now the control of the connections or bridging of the various pairs ofcontacts hereinbefore described, "reference may now be had to' Fig. 1 and, more particularly, to Fig. 2 of the drawings which J is asectional view taken on theline 2-2 of Fig. 1. Rigidly supported in the vertically extending posts 39 and 40 suitably secured to the base 2 4 pf the-casing 24 is a longitudinally extendingbar 41 upon which is pivoted 'a series of levers 42 42", 42, etc, positioned and spaced from one another so that the up per ends thereof are adapted to coo erate respectively with the pairs of alignei contacts hereinbefore described. Thus, as shown in Fig. 2, the lever 42 supports at its upper end two bridging members 43 and 44 suitably insulated from one-another and adaptedupon swinging of the lever 42 in a counter-. clockwise direction about its pivot 41 to bridge ,respeetively the-contacts 26 and 28 of one pair, and the contacts 27. and 25 of the other pair to bring about the circuit connections hereinbefore described. The movement of the lever ia 'ime' circuitclosing position is preferably brought about b means of a coin-controlled mechanism.

tending portion 45atthe lower end ofrwhich 1 10 thereis integrally formed a ring-shaped lug] 46, clearly shown in Figs. 2 and The rear wall 24 of the casing 24 hereinbefore described terminates as at 47 leaving a sufficient longitu ace "between its lower end fl inally extending bar 48 immediately the lug 46 to permit the movement of a. coin to the right as viewedln Fig. 2. Extending across the rear wall 24 and attached thereto in spaced relation therefrom is a housing l9 providedwith a plural; it of openings 50 commensurate n number w th. the number of levers 42?, 42", eta, and

eaeh'of sufiicient. s1z'e. to permitlth entry' therein of the desired-coin, as for example 1. aftwenty-fivecent piece. As shown more clearly in slightly enlarged-scale in Fig. 3, being broken -away, there are interposed between'wall 24" and the rhousing wall 49'side walls 50 and-50". pace pa t 47 and a 11 'by a distance equivalent to the diameter of Coins of smaller size continue in their downward, movement between the inwardly bent- .portions 50 and 50", and are discharged through the channel formed by the outwardly bent lower portion 24 of the rear wall,-as shown in Fig. 2. The coin, indicated at 51in dotted llnes,

' thus halted by'the ortions 50 and 50, may

thereupon'be move inwardly or to the right asviewed in Fig. 2 bymeans of a pluige" 52 slidably supported in the housing 49 provided with a.spring.-53 tending to urge the plunger 52in an outward direction, it being understood that there is proi'ided one 'plunger for each lever 42*, 42 etc. The inner end of the plunger 52 isprovided with a disk-shaped coin-en aging portion 54 which is adapted to be housed in the recess 54 on the inside of the housing 49 due to the action of the spring 53. A'handle 55 is pro+ vided to permit manual operation of the plunger. 7 t

The ,coin 51, having thus been positioned immediately in front of a lug 46, as for example on the lever 42-45, is moved toward the right upon manual operation of the plunger 52, whereupon the lever 42 is swung in a counter-clockwise direction to bridge the contacts hereinbefore described, thus making thecircuit connections to one of the sub-stations, as for example station 35. The coin. 51 thereupon drops into the interior of the casing 24,, the bar 48 being providedwith an inclined surface 56, as clearly shown in Fig. 2, to guide the coininwardly and downwardly into the casing 24. x

Each lug 46 is recessed as at 46 so that I manual-operation of a'plun er 52 in-the ablie inner end 54 sence of a coin 51 causes t of the plunger to ride into the-recess 46? of the lug, thus preventing an operation, of .a

lever to be brought about.

Each of the levers 42. 42",-42, etc., is provided with a downwardly extending por% tion 57, 57", 57. etc., respectively. Fig. 2 showing clearly in side elevation the portion 57", of the lever 42". These portions 57 .57", etc., extend downwardl to substantially A abut against a universal ar 58 extending longitudinally of the casing 24, as shown in Fig. 1, the bar 58 being siidably supported sts 61 and 62 inslidable' engagement wit pins 59 and 60, respectively, secured to the ends of the universal bar 58. Springs,

the levers 42', 42", etc., is operated as hereinbefore described in response to the insertion of a coin, the associated downward] extending portion 57 57", etc., contacts wit the universal bar 58 and moves the latter to a the right as viewed in Fig. 2, thus to move the'ratchet 65 through the pawl 64, inorder to tally or record the coin thus inserted.

As hereinbefore noted, the operation of I any one of the levers 425"42", etc., closes the circuit to the-motor 30, thusto place the latter in operation to make operative certaincontrollin apparatus which may now be described. eferring particularly to Fig. 1, it will be seen that'the motor 30 is connected through a train of reduction gears,

in the post 40 hereinbefore descri generallv indicated at 67 suitably supportedv to the gear 68 mounted upon the shaft 69 rot-atably. supported in the "posts 39 and 40, the latter being provided with suitable bearings therefor. The reduction gearing 67-68 is so proportioned with respect tothe speed of the motor 30 that the gear 68 with the shaft 69 is caused to make one revolution in. a redetermined length of time, as for exampee in a .period of one-half hour, this period ice, as for example at the station 35, is intended to be carried on for the fee or coin depyosited as hereinbefore described'.'-

pon the shaft 69 is mounted to be rotated therewith a drum 70, being provided with a series of circumferentially extendinggrooves .or recesses 70, 70", 70, etc., equal in num-' tended to be supplied with individual serv s. that for whlch the individual receiving service. Extending around the drum'70 and guided within the grooves 70, 70", etc., are

what may be termed the clutch 'bands 71,

71", 71'', etc. respectively. As is more'clearly shown in Fig. 2. the clutch band 71 comprises. preferably "a strip of spring metal,

such as s ring steel for example, formed so' y to tend to grip the drum 70, the

as no ends of the band 71 being connected by means of a link 72, the ends being preferably loosely and pivotafly connected thereto. In

Fig. 4" there is illustrated on an enlarged scale the connecting link 72 associated .with

each of the bands 71', 71', etc.,and, it will be seen that upon the respective .ends of I the link 72 are rigidly mounted the pins 73 and 74 about which the ends .of the band 71 are bent, thus to. form a pivotal canopen the nection therebetween. As will be seen in Fig. 4, the connecting link as a whole forms what may be termed an opensided square for a purpose to be more c'early hereinafter described.

Referring now to Fig. 2 of the drawings,

-As will be seenin Fig. 2, the lug 77 engages the lower end of the link 72 and thus prevents the drum from carrying the clutch band 71 around with it. As, however, the lever 42 is swung in a counter-clockwise direction as hereinbefore described, the extension 7 5? thereof is likewise swung about the pivot 41 thereby to raise the lug 77 outof engaging position with the lower'end 74 of the link- 72 and into the position shown at a in Fig. 4, wherein it will be noted that the lug 77 is positioned between the ends 7 3-and 74 0f the link thus to release the band"-"'T1 28", The circuit to and permit it to berotated with the drum 7-0, thelug 77 passing through the open square of the link 72. At b in Fig. 4 is shown the band 71 released and in the course of its rotary movement with the drum 70. The rotation is completed after the lapse ot' the predetermined time interval hereinbefore noted, and as the link 72 approaches the lugs 76 and 77 of the extension it being noted that the drum 70 is rotated in clockwise direction, the upper end 73 of the connecting link 72 engages the lug 7.6, as shown at (2 in Fig. 4. Such engagement causes the band 71 to be more tightly drawn about the drum 70, the latter continuing its movement thereby to ca-rry with it the lug 76 and thus to swing the lever 7 Eff-A2 in clockwise direction about the piv0t.41 to circuit connections hereinbet'ore dethus interrupting the individual service, cutting off the filament current of the detector and amplifier and opening the circuit of the motor 30.

scribed,

Continued rotary movement of the drum.

70 either because of the continued operation of the motor 30 due to the closure of its .circuit at another pair of contacts or by reason of the coasting of the motor and the drum 70 carries-the band 71 from the position shown at (Z in Figure 4 to the position shown at e in Figure 4, in which latterposition it will be seen that the lower lug, 77 on the downwardly lever arm 75 has been swung into position to engagethe lower end frequency currents or the connecting link. The rotation of the band 71 is thus halted and it will be seen the band 71 in such manner that any tendency of the latter to wrap itself about the drum 70 is effectively counteracted.

It might at this point be noted that as the band 71 causes the lever 4275 to be swung into circuit-opening position, the lug 76 as shown at; 0 in Figure 4 is swung downwardly into the position clearly shown at 0, whereby the open squared link 7 2 may pass the lug 76 in order that the lower end 74 thereof may engage the lug 7 7 simultaneously placed in its path of movement.

Should sub-station 35 for example be the only one that has been connected to the common receiving apparatus, the hereinbefore described disconnecting operation after the lapse of a predetermined time interval will take place, it being noted that the current to the filaments of'the various vacuum tubes as well as also to the motor 30 is thereby interrupted at the contacts 25 and 27. Should however any other sub-station have been made operative subsequent to the substation 35, the hereinbefore described disconnecting operation will be efiective to disconnect the sub-stat-ion 35 from the 'main receiving apparatus as at the contacts 26 and the filaments qt the various vacuum'tubes and also of the motor 30 will however be maintained closed at the switch contacts associated withthe'particular sub-station subsequently placed in operation as hereinbefore assumed. The'appara-' tus will therefore continue in operation as to this particular subsequently operated substation until the lapse of the predetermined time interval as determined by the release of the clutch band associated with that sta- --tion, whence the disconnection is effected by the contacts controlled by the respective clutch band.

As hereinbefore noted, the communications intended to be received at the various sub stations may be broadcasted by radio as has been assumed in connection with the main receiving apparatus and as hereinbefore described or by means of existing telephone circuits or lines. In the phone currents may they may be currents of high frequency outside of the range 0 latter case, the telebe ofthe usual voiceaudibility suitably modulated in accordance with speech. In Figure 1 there is shown diagrammatically a modified formof apparatus adapted to be used in case the communications intended. to be received are transmitted by a wire connection.

At 16 and 1'7. are shown two conductors representing the wire circuit over which the communications are transmitted. Assuming that'the latter are transmitted by currents of audio frequency, there is prererably connected to the conductors .16 and 17 an amplifier indicated diagrammatically at 18, the amplifier taking the form of the usual three-element vacuum tube type. There are shown the binding posts 19 and 20 leading to the filaments and adapted to be connected to the conductors 19 and 20 respectively of Figure 1, and the binding posts 22 and 23 on the output side of the amplifier 18 are adapted to be connected to the conductors 36 and 23 respectively of Figure 1. The currents of audio frequency received over the metallic circuit 161'7% may thus beamplified to an extent commensurate with the number of substations intended to be served as hereinbefore described, while the operativeness of the amplifier 18 may be similarly controlled as described in connection with Figure 1. The. amplifier 18 may take the specific form of the amplifier 18 hereinbefore described in detail; but it will be understood that where the currents are of audio fre uency, the first vacuum tube 'V need not unction as a detector; hence, the arrangement, such as the grid-leak GL, for causing the first tube V to function as a detector need not be employed, and is therefore to be understood as being omitted where the currents are of audio frequency.

Should the communications received over the metallic circuit 16*-17 have the second above-mentioned characteristic, namely high frequency modulated currents, the device diagrammatically indicated at l8" of Figure 1" preferably takes the form of a detector or demodulator together with the desired degree of amplification, similarly as already ascribed in connection with Figure 1.

It will thus be seen that there has been provided in this invention a system of telehonic distribution in which the several ob- ]ects of the invention are attained and, in

which many advantages are achieved. It 'may be briefly noted that the apparatus pro- .vided is of practical construction and of simple and positive operation and that-it is wel adapted to meet the conditions of practical use. More particularly, it will be seen that the apparatus may be readily and conveniently 'manipulated without requiring a high degree of skill-or knowledge and hence is well adapted for. reliable and dependable operation in public use.

As many possible embodiments might'be made of the above invention and as various changes might be made in theembodimentv above set forth, it is to be understood that all matter herein set forth or shown. in the accompanying drawings is to be interpreted as. illustrative and not in a limiting sense.

' -I claim as my invention 1. In apparatus of the general nature of that herein described, in combination, a. main re ceiving circuit adapted to be connected to a channel of communication, 'a receiving translating device, means for connecting said translating device to said main receiving circuit, normally ineffective means for effecting a disconnection of said translating device from said main receiving circuit after the lapse of a predetermined time interval, and means effective uponthe making of said connection adapted to make operative said main receiving circuit with respect to said channel of communication and to make cilective said normallyineffective means.

2. In apparatusof the general nature'ol? that herein described, 'in' combination, a main receiving circuit adapted to be connected to a channel of communication, a

thermionic device included insaid receiving circuit adaptedyto determine the operativeness of said receiving circuit, a translating receiving device adapted to be connected -to said receiving circuit, means operative when said device is connected. to said circuit for making said thermionic device active thereby to make said receiving circuit operative and means responsive to the making active of said thermionic device for removing said translating device from said receiving cir' cuit but operative only after the lapse of a predetermined time interval. r

3. In. apparatus of the general nature of that herein described, in combination, a

main receiving cir uit adapted to be connected to a channel of communication, a receiving translating device adapted to be connected to said receiving circuit, and timecontrolled means including a thermionic device co-ntrolled. thereby adapted after the lapse of a predetermined time interval to make said main receiving (llClllt inoperative. t

4. In apparatus of the general nature oi that herein described, in combination, 'a main receiving circuit adapted to be connected to a channel of comn'mnicatio'n, a,

thermionic device including a filament as a source of ions in "said main receiving tircuit, a source of current adapted to supply said filament with current, a translatmg receiving device adapted to be connected to said receiving circuit, and time-controlled means adapted after the lapse of a predetermined-time intervalto interrupt the flow of current from saidcui'rent source to said main receiving circuit.

5. In apparatus of the general nature said filament, thereby to make inoperative that herein described, incombination, -a

main receiving circuit adapted to be connected to a channel of communication, a thermionic device havmg a filament as a source of ions included insaid receiving circuit, a source of current adapted to sup ply said filament, a translating receiving 'device adapted to be (gonnected to said'receiving circuit, and atom-controlled means adapted .to close the circuit to said filament, thereby to make said receiving circuit opera ative.- I I 6. In apparatus of the general nature of that herein described, in combination, a main receiving circuit adapted to be connected to a channel of communication, a

thermionic device having a filament as a source of ions included in said recelvmg circuit, a source of current adapted to supply said filament, a translating receiving device adapted to beconneeted to said receiving circuit, coin-controlled means adapted to close the circuit to said filament, thereby to make said receiving circuit operative, and time-controlled means for interrupting the current to said filament, thereby filament, a receiving translating device,

adapted to be connected to .the output of said amplifier, and coin-controlled mechanism for controlling the flow of current to said filament. I i

8. In apparatus of the general nature of that herein described, in combination, a main receiving circuit adapted to be connected to a'channel of communication, an amplifier ineludin at least one thermionic device having a' lament for a source of.

' electrons connected to said receiving circuit time interval.

' device havi g a,

for increasing theintensity of currents reccived therein, a source of current for said filament, a receiving translating device adapfted tobe'connected to the output of said amp ifier, and time-controlled mechanism for pernntting the flow of current from saidpredetermined Source to said filament for a 9. In apparatus of the general nature of that herein described, in combination, a main receiving circuit adapted 'to (be connected to achanne'l of communication, an amplifier includin atleast one thermionic ament for a source of V electrons connected 'to said receiving circuit for increasing the intensityjof currents re ceived therein, a source of current for said filament, a receiving translating device adapted to be connected tothe'outp'ut of said I ampli er, coin-controlled mechanism adapted to close the circuit said source of current to said' filament," thereby to make saidflreceivingcircuit and amplifier operas tivc with respect to saidreceiving translating device, and means anadecfiective u on the operation of said coin-controlled mec l'anism and operative after the lapse of a predetermined time interval for interrupting] the flow of current to said filament, thereby 'inoperativ e.

10. In apparatus of the general nature of that herein described, in combination, a

to make said'receiving circuit and amplifier main receiving circuit adapted to be con nected to a channel of communication and to receive a high frequency modulated current, a demodulator including a thermionic device having a filament for a source of electrons associated with said receiving circuit, a translatin r receiving device responsive to the currents emodulated by said demodulator,

a source ofcurrent for said filament, and a coin-controlled switch for connecting said filament to said source of current, thereby to make operative said demodulator. I

11. In'apparatusof the general nature of that herein described, in combination, a

main receiving circuit adapted to be connected to a channel of communication and to receive a high frequenc modulated current, a demodulator inclu ing a thermionic device having a filament for a source of. electrons associated with said receiving cirv cult, a translating receiving device res n,-

sive to the, currents demodulated by sai demodulator, a source of current for said filament, a switch for controlling the'fiow .of current from said source to said filament,

and time-controlled means ada ted to open said switch after the lapse o a predeter-,

mined time interval thereby to make said demodulator inoperative."

12. In apparatus of the general nature of 7 that herein described, in combination, a, -main receiving circuit adapted to be connected to achanne'l of communicationand to I receive a high frequency modulated current, a demodulator including a thermionic device having afilament for a source of electrons associated with said receivingeircuit, a translating receiving device responsive to the' currents demodulated by said demodw lator, a source ofcurrent for said filament,

a switch for controlling the flow of current from said source -to said filament, means made efie ctive upon the closure of said switch and operative after the lapse of a predetermined time interval to 'open said switch, thereby to make inoperative said demodulator, and coin-controlled mechanism for closing said switchQ 13.1I11 apparatus of the general nature ofthat herein described, in combinat1 on, a

receiving translating device associated therewith, a switch adapted upon the closure thereof to make said receiving circuit and said device operative, a normally ineffective main receiving circuit adapted to be'connected to a channel of communication, a

' nected to achainnel of communication,

- dering said receiving circuit operative upon time-controlled mechanism associated with cluded in said auxiliary circuit and as-- said switch ada ted upon the lapse of a sociated with said plurality of switches predetermined time interval to open said adapted uponv the closure of any one of said switch thereby to make said circuit anddeswitches to close said auxiliary circuit and vice inoperative, and means associated with upon the opening of all of said switches to said switch adapted upon the closure thereof open said auxiliary circuit. to makesaid time-controlled mechanism ef- 18. In apparatus of the general'nature of fective. that herein described, in combination, a

14; In ap v aratus of the general nature main receiving circuit adapted to be connectof that herein described, in combination, a ed to a channel of communication a plumain receiving circuit. adapted to be conrality of translating devices, a coin-connected to channel of communication, a trolled device allotted to each translating receiving nslating device associated theredevice and adapted upon operation thereof with, a switch adapted upon the closure to connect said translatin device to said thereof todnake said receiving circuit and main receiving circuit, wiei'cby as many,

said device, operative, a normally ineffective translating devices may be connected to said time-controlled mechanism associated with main receiving circuit as there are coin-consaid switch and adapted after the lapse of trolled devices operated, and a "timeconpredetermined interval of ti to p n trolled device allotted to each translating desaid switch, electrical means including an vice and adapted to effect the disconnection auxiliary circuit for making said time-cOnof a. translating device from said main rel d mechanisnia cfi'ective, and auxiliary ceiving circuit after the lapse of a predetercontacts associated with said switch adapted m d ti i t l f m th ti of comupon'tl e closure of said switch to close said l ti th ccnnection f-th t l ti d auxiliary circuit thereby to make effective i t {h receiving i it said time-controlled mechanisnn 19. In apparatus of the general nature of In PlP f g f na that herein described, in combination a main of P yq b a 1n comblna-tlon; a receiving circuit adapted to. be connected to mam l'ecelvn mrcwt d p a channel of'communication, a plurality of n t to a c v l offiommuplcfltloni Wreceiving translating devices, an amplifier 1'e9e1vmgt1" m51atmg device assoclated there associated with saidmain receiving circuit a. a swltich adapted UP011 the closure for increasing the intensity ottcurrents re -v thereof to make m rgceivingfiircuitiand ceived therein, a plurality of switches each 531d l )'i" 'P r? 9 y m 'q associated with one of said translating re- -niova e member associated with Sa1(1, SW1tCh ceving devices for connecting said recelvmg.

n adallte'd upon nredehermined I devices separately to the output side of said ment tlieieof to open said switch, an electric amplifier and a coimcontrolled mechanism and means for closing the circuit: of said Separately Dper'atinn, Said switches motor upon the closure of said switch. 20' Tn ap'paratusbof the general nature'of V receiving circuit adapted to be connected to a main receiving circuit adapted tobe conreceiving translating devices, a plurality of ii f g i i switches each associated with one of said 3 5'; gi e 2 3. fstranslating devices for connecting its assoto g main nneic eac Y 3 y ciated device .to said main receiving circuit. e Vm t' t means. whereby as many ti'anslatin devices may be sociated with each 0 said switches for renconnected in-common to said main receiving circuit as there are switches 0 rated a the-closure of any one thereof and .inoperape fz i fi of 1 Switches are Open? interposed between said plurality of switches apparatus the general e) and said counting mechanismadapted' upon of that herein d in combination, the operatien of any one of said switches to.

a main receiving circuit p operate said counting mechanism. nect-ed toia gha'nnel of commllmcatlona a 21. In apparatus of the general nature of P1111111; receiving translating V C that herein described, in combination, amain a P 1 3 of w .each apte 9 receiving circuit adapted to be connected to ,9 a Q a 11111111 a channel of communication, a pluralityof ceivmg circuit, an auxiliary electric circuit translating receivin devices, a plurality of associated with said main receiving circuit switches each associated [with one of said adapted when closed torender said receiv ng levices and adapted to ,connect its as ociated,

circuit operative 'and'when open to render. -.device to said main receiving circuit, who'resa dreceiving circuit inoperative, and a pluby as many translating dev ces may be con:

' rality of auxiliary contacts in parallel innected in common to said main receivingcir a channel of communication, a plurality of motor dnvmg 531d movable membefv associated with each-of said switches for lie ' lib counting mechanism, and a common means 16 In a) ar'itus of the eneral nature 1 h that herein dQSCllbBCl, in combination,a main of that herein described, in combination,

cuit as there are switches operated, a coincontrolled mechanism associated 'with each of said switches for operating said switches into circuit-closing position, a counting mechanism, and means interposed between said coin-controlled mechanism and said counting mechanism adapted upon operation of any one of said coin-controlled mechanisms to operate said counting mechanism.

22. In apparatus of the general. nature of that herein described, in combination, a main receiving circuit adapted to, be connected to a channel of communication, a plurality of receiving t'anslating devices, a plurality of switches each associated with one of said translatingdevices for connectingits associated device to said main receiving circuit, a normally ineffective movable member having associated therewith a plurality-of normally ineffective devices arranged each to be moved thereby, and means elfective upon the actuation of any one switch to set said movable member in motion and to make one of said devices associated with said movable member effective, to be moved therewith, said last-mentioned device being arranged after the completion of a predetermined movement of said movable member to disconnect a corresponding translating device from said main receiving circuit.

23. In apparatusof the general nature of that herein described, in combination, a main receiving circuit adapted to be connected to a channel of communication, a plurality of receiving translating devices, a plurality of switches each associated with one of said translating devices for connecting its associated device to said main receiving circuit, a normally inefi'ective movable member having associated therewith a plurality of normally inefl'ectivc devices arranged each to be moved thereby, means effective upon the actuation of any one switch to set said movable member in motion and to make one of said devices associated with said movable member effective, to be moved therewithd said lasbmentioned device being arrange after" ,the completion of a predetermined movement of said movable member to disconnect a corresponding translating device from said main receiving circuit,and means for halting the movement of said movable member upon the disconnection of all of said translating devices from said main receiving circuit In testimony whereof, I have signed my name to this specification this 1st day of June, 1922.

LUDWIG M. DIETERIC-H. 

